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authorMatt Johnston <matt@ucc.asn.au>2006-03-08 13:23:58 +0000
committerMatt Johnston <matt@ucc.asn.au>2006-03-08 13:23:58 +0000
commit6ae3a09ef33b62811a7f60a1f97dcb89907c1ac1 (patch)
tree37e84722c5b30bbfc86947bee260473d4604b616 /libtommath/bncore.c
parent33defd1f9b6c4889fe5b075e6abb0b24c00f3a59 (diff)
parent8608a8e64c1aeda096867f43f89e29e1aee207ae (diff)
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
to branch 'au.asn.ucc.matt.dropbear' (head fdf4a7a3b97ae5046139915de7e40399cceb2c01) --HG-- extra : convert_revision : dc4809882e1b9f2dcd3f8bbe38c74a0a52c39ce4
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diff --git a/libtommath/bncore.c b/libtommath/bncore.c
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+#include <tommath.h>
+#ifdef BNCORE_C
+/* LibTomMath, multiple-precision integer library -- Tom St Denis
+ *
+ * LibTomMath is a library that provides multiple-precision
+ * integer arithmetic as well as number theoretic functionality.
+ *
+ * The library was designed directly after the MPI library by
+ * Michael Fromberger but has been written from scratch with
+ * additional optimizations in place.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ *
+ * Tom St Denis, tomstdenis@iahu.ca, http://math.libtomcrypt.org
+ */
+
+/* Known optimal configurations
+
+ CPU /Compiler /MUL CUTOFF/SQR CUTOFF
+-------------------------------------------------------------
+ Intel P4 Northwood /GCC v3.4.1 / 88/ 128/LTM 0.32 ;-)
+ AMD Athlon64 /GCC v3.4.4 / 74/ 124/LTM 0.34
+
+*/
+
+int KARATSUBA_MUL_CUTOFF = 74, /* Min. number of digits before Karatsuba multiplication is used. */
+ KARATSUBA_SQR_CUTOFF = 124, /* Min. number of digits before Karatsuba squaring is used. */
+
+ TOOM_MUL_CUTOFF = 350, /* no optimal values of these are known yet so set em high */
+ TOOM_SQR_CUTOFF = 400;
+#endif